Printing-ink composition.



GEORGE CLARENCE WOOLLEY, NEW YORK, N. Y.

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No Drawing.

To all whom it may concern:

Be it known that I, GEORGE CLARENCE ,WooLLnY, a citizen of the UnitedStates, rc

siding at New York, in the county of New York and State of New York,have invented 4 place of linseed oil varnish. It is free rom aluminumoleate or aluminum stearate',

odor, works clean on the press, does not form a skin as linseedvarnish'does on the rollers, which does away with washing up so often.

In producing the ink I preferably proomd as follows:

I first dissolve oleic or stearic'acids, or the corresponding glycerids,in an alkaline solution, for example caustic soda, as in production ofordinary soaps. The liquid resulting is then purified or filtered ifdesirable, after which a metallic salt, such as aluminum sulfate,-isadded. This produces a precipitate ofan aluminum soap, such as whichmaterial forms the basis of the ink made in accordance with myinvention.

I dissolve about 10 parts of such an aluminum soap in about 90 parts ofa hydrocarbon oil, which may be produced by-. mixing filtered-cylinderstock of a avity of about 23 B., and a light oil having a gravity ofabout40 136., known as #28 paraflin oil.

- Without limiting myself to proportions, I

preferably employ the particular cylinder and light oil referred to inabout the proportions of 2 parts of the of the lighter'oil.

the

cylinder and l part Specification of Letters Patent. Patented Aug, 14,1917,

Application filed March 28, 1917. Serial No. 158,068.

' In some instances I have omitted the above mentioned oils and use anoil known as 300 oil having a gravity of about 40 Be. alone, and producean ink which is quickly absorbed and produces splendid results inpractice. In omitting the cylinder oil, I preferably employ a largeramount of aluminum soap, e. g. a out 25 parts 'of the oleate to 7 5parts of the oil. a

To the alummum soap, before mixing with v the oily vehicle, or to themixture of aluminum soap and oily vehicle, I add any suitable pigment,in amount necessary to produce the desired shade of color. I can usevarious pigments for this purpose, and I call attention to the fact thatlead salts,

particularly those of a basic nature are as suitable for use in thisinvention as any of the other igments.

In emp oymg the ink in printing, the mineral oil is absorbed by thepaper, leaving the oleate or' steal-ate and the pigment onthe paper,which dries to produce a finish equal to that produced by the use oflinseed oil.

Without limiting myself to the exact proportions or materials, I 've thefollowin specific example of an made in accor ance with this invention.

Heavy cylinder oil, 23 B -2- 40parts Light mineral oil, 40 B 5partsAluminum oleate 5parts Pigment (chrome yellow) 50 parts What-I claim: Aprinting ink composition comprising an aluminumsalt of a fatt acid, ahydrocarbon mineral oil not lig ter than about 40 B., and a pigment.

In testimony whereof I aflix my signature.

' GEORGE CLARENCE .WOOLLEY.

